As she and Danny try to uncover a DEA mole, Maria is upset to later find out that her brother Javi (Javier) is involved with the drug cartel.Blue Bloods Season 6 But Javi reveals he has been a DEA informant for the past three months. As the partners infiltrate a building housing the drugs, Maria sees that Javi is working both sides. When a cartel member fires at Maria, however, Javi steps in front and takes the fatal bullet.While escorting an undercover moving van transporting $30 million worth of drugs that are considered DEA evidence, Danny and Maria's vehicle is intentionally rammed, injuring Maria while the van is stolen.